Ammonia-condenser for ice-machines.



W. H. MANNS.

AMMONIA CONDENSER FOR ICE MACHINES.

APPLICATLQN FILED JULYSI. I914- Patented July 9,1918.

WILLIAM H. MANNS, 0F WAYNESBOBO, PENNSYLVANIA, ASSIGNGB TO FRICK COM- PANY, O33 WAYNESIBORO, PENNSYLVALTIA, A C B/PQB/ATIONQ -AMlVIONIA-CONDENSER F03 ICE-MACHINES.

Specification of Letters Patent.

Application filed. July 31, 1914. Serial N 0. 854,333.

To all whom it may concern:

Be it known that I, WILLIAM H. MANNS, a citizen of the United States, residing at Waynesboro, Franklin'county, and State of Pennsylvania, have invented and discovered certain new" and useful Improvements in Ammonia-Condensers for Ice-Machines, of which the following is a specification.

My said invention consists in certain im provements in the construction and arrangement of parts of ammonia condensers for ice making machines of that type belonging to the flooded system, whereby any type ofcondenser can be made to operate as a flooded condenseryand perfect and satis factory results secured, all as will be hereinafter more fully described and claimed.

The accompanying drawing which is made a part hereof, and on which similar reference characters indicate similar parts, shows a single coil of an ammonia condenser of the flooded type, illustrating my said invention.

In said drawing the portion marked A represents the tank for the cooling medium, B the ammonia gas header, and C the ammonia liquid header.

In the construction of-the condenser, as many of the coils of pipe will be arranged sideby side as required to form a condenser of the capacity desired. The inlet end 10 of each coil is coupled to the'ammonia gas header B, and the discharge end 11 of each coil iscoupled to the ammonia liquid header C. A controlling valve 1:2 is provided in the inlet end, and a controlling valve 13 in the discharge end. The gas header B receives the gaseous ammonia through the supply pipe 6 and the liquid ammonia header C'discharges through a discharge pipe 0.

Each coil of the condenser is preferably divided into two horizontal sections, substantially one third of the coil being above the division and two thirds below the division. Interposed in the coupling 14, joining the two adjacent pipes at thetop of the lower section, is a valve 15 mounted on a stem 16 which-has a screw-threaded section mounted in a screw-threaded perforation in the valve casing and projects to the outside when it is provided with a hand wheel 17 by which it may be operated and adjusted. Said valve seats against the end of horizontal pipe 20, which forms the first horizontal return in the coil after the ammonia has made its initial passage across the condenser-after entering pipe 10.

The gas header B and the liquid header 0 are'on a level with each other, and'both are on a level with the topof the condenser coil.

A flooded type of ammonia condenser is supposed to handle anhydrous ammonia in its liquid state only. All of the pipes are normally filled with liquid up to the gas header B. As soon as the ammonia gas comes in contact with the liquid ammonia the sensible heat from the ammonia gas is immediately absorbed and it will collapse into a liquid. The heat remaining in the ammonia liquid will be absorbed by the means of the water flowing from the tank A down over the outside of the coil. As soon as the ammonia gas comes in contact with the liquid ammonia which fills the coil, and is thus collapsed or condensed into a liquid state, its volume is reduced many times and therefore its flow through the coil should be controlled by means of an orifice the size of which can be regulated in proportion to thejemperatures and pressures under which the operation exists.

In the operation of the apparatus shown, understand, of course, that the operation in one coil is duplicated in every other coil of the condenser. the gas coming from header B into-pipe 10 immediately contacts with the liquid ammonia, which, under normal conditions. floods said pipe and immediately is collapsed into liquid form. The hot liquid thus formed passes along pipe 10 to the end opposite the inlet end and returns in pipe 20 from which it flows to the next pipe below in the coil. The size of the orifice in the discharge end of pipe 20 is controlled by means of the valve 15, which is adjusted to form a discharge opening of that size which will just accommodate the volume of liquid formed by the volume of gas coming into the pipe 10 and thus maintain an even and uniform pressure through out the coil. The liquid ammonia flows back and forth through the pipes to the bottom leading to the liquid ammonia header .C

from which the liquid ammonia is dis-- chargedthrough pipe a, as before stated.

By means ofthe valves 15, one of which is located in each individual coil in the condenser, it is possible to iregulate thefiowof the liquid from the top pipe 20 of the lower emen into t -othe p pe of he c011, h discharge orifice being regulated to determine the quantity of gasthat can beabsorbed or condensed by the small amount of liquid lying in the .pipe from this point back to the ,gas header, and thereby (regulate the flow of gas so (that it be uniform'in each andievery ,coil, and so that they will .work automatically and uniformly throughout the" entire condenser.

By the operation of this apparatus .the ammonia ,gas ,is condensed ,and cooled in im orm anner and final y scha g d through the liquid header within a few degreesof the temperature of the cooling nedium .or water itself, probably within from 2 to 5" ,of the initial {temperature ,of said Water- I l laving thus fully described my said inwith a liquid ammonia header, said gas header and said liquid header being ,ar'

ranged on thesame levelandion a level with the top of the coil, and a yajlve interposed in said coil near the gas inlet end adapted to regulate (the ,vorifice to a size which will take care of the flow of liquid ammonia the lower section in each coil, a liquid ammonia header, a connectlon from said liquid ammonia header to the lower pipe of the upper section of each coil, a liquid ammonia discharge pipe leading from said liquid ammonia header, a cold water supply 7 above each coil, each coil being provided with a regulating valve interposed'near the upper endofthe inlet section, whereby the priatedistance fromzthe inletend and adapt ed to maintain a liquid level between Said valve and theinlet end of thecoil-and with in the path of the cooling medium, SL1b$bantially asset forth. o

4. An vammonia condenserof the flooded system type comprising a coil of pipe with inlet and .outlet arranged approximately at or above the top thereof, the gas inlet being at one end of .Said ,coil and the liquid ammonia outlet at the other end of said coil, controlling valves for said inlets and outlets, a ya-lve positioned in the coil at a distance from .the ga inlet and arranged whereby the size of the orifice may be [regulated to conform-with the yolumeiof gas and maintain a flooded condition in theicoil at uniform pressure, and means for discharging a cooling medium over said Coil, sub,- stantially as set forth. V

31 Wi n ss whe e f, I ha e hereun o set my hand-and seal at Waynesbor0.,-,Bem y Vania, this 27th day of July, A; D. nineteen hundred and fourteen.

lWILLIA'M H. MA'NNS. Witnesses:

AL lN BAEIJ, SAMUEL F wqRKMAN.

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